Sunny Health & Fitness SF-B1879 User manual

SYNERGY MAGNETIC INDOOR
CYCLING BIKE
SF-B1879
USER MANUAL
IMPORTANT! Please retain owner’s manual for maintenance and adjustment instructions. Your
satisfaction is very important to us, PLEASE DO NOT RETURN UNTIL YOU HAVE
CONTACTED US: suppo[email protected] or 1- 877 - 90SUNNY (877-907-8669).

1
IMPORTANT SAFETY INFORMATION
We thank you for choosing our product. To ensure your safety and health, please use this
equipment correctly. It is important to read this entire manual before assembling and using the
equipment. Safe and effective use can only be achieved if the equipment is assembled,
maintained, and used properly. It is your responsibility to ensure that all users of the equipment
are informed of all warnings and precautions.
1. Before starting any exercise program, you should consult your physician to determine if you
have any medical or physical conditions that could put your health and safety at risk, or
prevent you from using the equipment properly. Your physician’s advice is essential if you are
taking medication that affects your heart rate, blood pressure, or cholesterol level.
2. Be aware of your body’s signals. Incorrect or excessive exercise can damage your health.
Stop exercising if you experience any of the following symptoms: pain, tightness in your chest,
irregular heartbeat, shortness of breath, lightheadedness, dizziness, or feelings of nausea. If
you do experience any of these conditions, you should consult your physician before
continuing with your exercise program.
3. Keep children and pets away from the equipment. The equipment is designed for adult use
only.
4. Use the equipment on a solid, flat level surface with a protective cover for your floor or carpet.
To ensure safety, the equipment should have at least 2 feet (60 CM) of free space all around
it.
5. Ensure that all nuts and bolts are securely tightened before using the equipment. The safety
of the equipment can only be maintained if it is regularly examined for damage and/or wear
and tear.
6. Always use the equipment as indicated. If you find any defective components while
assembling or checking the equipment, or if you hear any unusual noises coming from the
equipment during exercise, discontinue use of the equipment immediately and do not use
until the problem has been rectified.
7. Wear suitable clothing while using the equipment. Avoid wearing loose clothing that may
become entangled in the equipment.
8. Do not place fingers or objects into the moving parts of the equipment.
9. The maximum weight capacity of this unit is 275 pounds (125 KG).
10. The equipment is not suitable for therapeutic use.
11. To avoid bodily injury and/or damage to the product or property, proper lifting and moving are
required.
12. Your product is intended for use in cool and dry conditions. You should avoid storage in
extreme cold, hot or damp areas as this may lead to corrosion and other related problems.
13. This equipment is designed for indoor and home use only; it is not intended for commercial
use.

2
EXPLODED DIAGRAM
1
2
3
4
5
6
8
13
14 15R
15L
16L
16R
18
19
22
23
23
23
24
25
26
27
29
30
31
33
36
36
37
37
37
37
38
38 38
39
40
40
40
40
41
41
42
43
43
44
45
46
47 48
48
32
35
49
50
51
51
51
52
53
54
56
56
94
94
57
57
58
58
59
59
59
59
59
60
60
61
61
65
65
66
66
69
69
70
70
70
70
72
72
80
81
77
66
77
77
66
66
97
97
86 88
89
55
54a
54b
91
96
92
93
90
87
95R
95L
104
103
105
92
106
102 101 100
7
51
61
88
59 59
59
65
97
77
64 74 82 84
77
12
83 17
83
85
82
64 99
98
21
11
86
67
71
12 64
77
73
68
79
75
62
78
34
76
59
28 28
59
62
78
76
9
34
63
20 20
20 62
10
100
101
102
101
100
100

3
PARTS LIST
No.
Description
Spec.
Qty.
No.
Description
Spec.
Qty.
1
Main Frame
1
41
Foam Grip
2
2
Front Stabilizer
1
42
Foam Grip
1
3
Rear Stabilizer
1
43
Round End Cap
2
4
Handlebar Post
1
44
Middle Axle
1
5
Handlebar
1
45
Brake Washer
1
6
Front Handlebar
1
46
Sleeve 1
1
7
Seat Post
1
47
Sleeve 2
1
8
Seat Slider
1
48
Bearing
6004-ZZ
2
9
Magnet Bracket
1
49
Water Bottle Holder
1
10
Brake Assembly
1
50
Dumbbell Holder
1
11
Idler Wheel Shaft
1
51
Grommet
4
12
Connection Plate
2
52
Middle Axle Cover
1
13
Brake Cover
1
53
Plastic Washer
1
14
Belt Wheel
1
54
Computer
TZ4117
1
15L/R
L/R Crank
2
54a
Computer Wire A
1
16L/R
L/R Pedal
HD-102B
2
54b
Computer Wire B
1
17
Flywheel Assembly
1
55
Magnet
1
18
Seat
KX-6616
1
56
Handle Pulse
2
19
Poly V-belt
5PK-1420
1
57
Self-tapped Screw
ST4.2*15
2
20
High-intensity Magnet
6
58
Self-tapped Screw
ST3.5*10
2
21
Idler Wheel
1
59
Self-tapped Screw
ST4.2*15
11
22
Tension Control Knob
1
60
Screw
M5*10
2
23
Adjustment Knob
3
61
Socket Head Cap
Screw
M6*15
4
24
Left Chain Cover
1
62
Outer Hexagon Screw
M5*10
3
25
Right Chain Cover
1
63
Outer Hexagon Screw
M6*40
1
26
Front Cover
1
64
Socket Head Cap
Screw
M8*15
3
27
Crank Cover
1
65
Socket Head Cap
Screw
M10*15
4
28
Magnet Plate Cover
2
66
Socket Head Cap
Screw
M8*40
6
29
Magnet Upper Cover
1
67
Hex Bolt
M10*50
1
30
Magnet Lower Cover
1
68
Hex Lock Nut
M6
1
31
Expansible Cover
1
69
Hex Lock Nut
M8
2
32
Handlebar Cover
1
70
Hex Nut
M8
4
33
Spring
1
71
Hex Thin Nut
M10
1
34
Brake Bushing
2
72
Hex Flange Nut
M10*1.25P
2
35
Round Bushing
1
73
Hex Flange Nut
M12*1.0P
1
36
Transportation Wheel
2
74
Hex Flange Cap Nut
M12*1.0P
1
37
Oval End Cap
4
75
Flat Washer
Φ6.4*Φ12*1.6
1
38
Square Bushing
3
76
Flat Washer
Φ5.4*Φ10*1.0
3
39
Square End Cap
1
77
Flat Washer
Φ8.4*Φ16*1.6
6
40
Adjustment Foot Pad
4
78
Flat Washer
Φ5.1*Φ7.7*1.3
3

4
No.
Description
Spec.
Qty.
No.
Description
Spec.
Qty.
79
Spring Washer
Φ6.1*Φ9.3*1.6
1
93
Inductor Seat
1
80
Wave Washer
Φ20.7*Φ27*0.3
1
94
Crank Cap
2
81
Spring Washer
Φ20
1
95L/R
Nylon Nut
9/16
2
82
Hex Thin Nut
M12*1.0P
2
96
Sensor Wire
800mm
2
83
Bearing
6203-2RS
3
97
Socket Head Bolt
M5*10
4
84
Sleeve
1
98
Flat Washer
Φ8.4*Φ20*1.5
1
85
Flywheel Axle
1
99
Spring Washer
Φ8.1*Φ12.3*2.1
1
86
Flat Washer
Φ10.5*Φ20*2.0
3
100
Hexagonal Screw
M8*15
4
87
Cable Tie
1
101
Flat Washer
Φ8.4*Φ16*1.6
4
88
Hex Lock Nut
M10
2
102
Shipping Tube
Φ8.4*Φ16*1.6
2
89
Socket Head Screw
M5*10
1
103
Spanner
S13-S14-S15
1
90
Carriage Bolt
M10*35
2
104
Allen Wrench
S6-S5
1
91
Handle Pulse Wire
1
105
Wrench
S14-S17
1
92
Self-tap Screw
ST4.2*10
2
106
Wrench
S19-S22
1
HARDWARE PACKAGE
#77 φ8.4*φ16*1.6
4PCS
#66 M8*40 4PCS
#90 M10*35 2PCS
#88 M10 2PCS
#86 φ10.5*φ20*2.0
2PCS
#97 M5*10 4PCS
#89 M5*10 1PC
#104 S6-S5 1PC
#103 S13-S14-S15 1PC
#105 S13-S16 1PC
#106 S19-S22 1PC
Ordering Replacement Parts (U.S. and Canadian Customers only)
Please provide the following information in order for us to accurately identify the part(s) needed:
✓The model number (found on cover of manual)
✓The product name (found on cover of manual)
✓The part number found on the “EXPLODED DIAGRAM” and “PARTS LIST” (found near the front
of the manual)
Please contact us at [email protected] or 1- 877 - 90SUNNY (877-907-8669).

5
ASSEMBLY INSTRUCTIONS
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [email protected] or 1-877-90SUNNY (877-
907-8669).
1
100
101
#104 S6-S5
1PC
102 100
101
100
101
100
101
102
#101 φ8.4*φ16*1.6
4PCS
#100 M8*15 4PCS
1
3
2
77
66
77
66
77
#66 M8*40 4PCS
#77 φ8.4*φ16*1.6
4PCS
#104 S6-S5
1PC
66
77
66
STEP 1:
Unscrew the 4 Hexagonal Screws (No. 100)
from Main Frame (No. 1) with Allen Wrench
(No. 104) and remove 4 Flat Washers (No. 101)
and 2 Shipping Tubes (No. 102).
You may save these parts [Hexagonal Screws
(No. 100), Flat Washers (No. 101), and
Shipping Tube (No. 102)] in case you would like
to repackage and transport this equipment in the
future.
STEP 2:
Attach the Front & Rear Stabilizers (No. 2 &
No. 3) to the Main Frame (No. 1) using 4 Socket
Head Cap Screws (No. 66) and 4 Flat Washers
(No. 77). Tighten and secure with Allen Wrench
(No. 104).

6
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [email protected] or 1-877-90SUNNY (877-
907-8669).
1
23
4
5
86
88
91
96
54
54a
54b
#90 M10*35 2PCS
#88 M10 2PCS
#86 10.5*φ20*2.0
2PCS
90
#105 S13-S16
1PC
90
54b 54a
96 91
S16
STEP 3:
Loose and pull out Adjustment Knob (No. 23),
insert Handlebar Post (No. 4) into Main Frame
(No. 1) and adjust to the desired height. Secure
it in place by reinserting and tightening the
Adjustment Knob (No. 23).
Attach Handlebar (No. 5) onto Handlebar Post
(No. 4) with 2 Carriage Bolts (No. 90), 2 Flat
Washers (No. 86) and 2 Hex Lock Nuts (No.
88). Tighten and secure with Wrench (No. 105).
Insert Computer (No. 54) into the computer
bracket located on Handlebar Post (No. 4). Be
sure not to pinch Computer Wire A (No. 54a)
and Computer Wire B (No. 54b). Connect
Computer Wire A (No. 54a) with Handle Pulse
Wire (No. 91) on Handlebar (No. 5) and
connect Computer Wire B (No. 54b) with
Sensor Wire (No. 96).

7
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [email protected] or 1-877-90SUNNY (877-
907-8669).
49
50
97
97
1
#97 M5*10 4PCS
#103 S13-S14-S15
1PC
97
97
89
32
1
#89 M5*10 1PC #103 S13-S14-S15
1PC
5
STEP 4:
Attach the Water Bottle Holder (No. 49) and
Dumbbell Holder (No. 50) onto the Main Frame
(No. 1) with the 4 Socket Head Bolts (No. 97).
Tighten and secure with Spanner (No. 103).
STEP 5:
Attach Handlebar Cover (No. 32) onto the
Handlebar (No. 5) with 1 Socket Head Screw
(No. 89). Tighten and secure with Spanner (No.
103).

8
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [email protected] or 1-877-90SUNNY (877-
907-8669).
16L
16R
95R
95L
15R
15L
1
#103 S13-S14-S15
1PC
#106 S19-S22 1PC
S15
S22
#95L 9/16 1PC
#95R 9/16 1PC
S15
103
15L
16L
16L
S15
103
106 95L
S22
16R
15R
S15
103
95R
106
S19
S15
103
22
STEP 6:
WARNING! Read instructions carefully as
improper assembly may cause permanent
damage to your bike.
Remove the 2 Left & Right Nylon Nuts (No.
95L & No. 95R) located on the Left & Right
Pedals (No. 16L & No. 16R) with Wrench (No.
106).
Turn the Tension Control Knob (No. 22)
clockwise as tightly as you can with your hand.
Align the Left Pedal (No. 16L) with the thread of
the Left Crank (No. 15L) at 90°. Turn the square
part of pedal bolt on Left Pedal (No. 16L)
counter-clockwise as tightly as you can with your
hand. Use Spanner (No. 103) to hold the square
part of pedal bolt on Left Pedal (No. 16L) and
secure it counter-clockwise until it is tightened
onto the Left Crank (No. 15L). Turn the Left
Nylon Nut (No. 95L) clockwise as tightly as you
can with your hand. Use Spanner (No. 103) to
hold the square part of pedal bolt on Left Pedal
(No. 16L) in place. Then use Wrench (No. 106)
to screw the Left Nylon Nut (No. 95L) clockwise
until it is tightened onto the Left Crank (No.
15L).
Align the Right Pedal (No. 16R) with the thread
of the Right Crank (No. 15R) at 90°. Turn the
square part of pedal bolt on Right Pedal (No.
16R) clockwise as tightly as you can with your
hand. Use Spanner (No. 103) to hold the square
part of pedal bolt on Right Pedal (No. 16R) and
secure it clockwise until it is tightened onto the
Right Crank (No. 15R). Turn the Right Nylon
Nut (No. 95R) counter-clockwise as tightly as
you can with your hand. Use Spanner (No. 103)
to hold the square part of pedal bolt on Right
Pedal (No. 16R) in place. Then use Wrench
(No. 106) to screw the Right Nylon Nut (No.
95R) counter-clockwise until it is tightened onto
the Right Crank (No. 15R).
The assembly is complete!

9
BATTERY INSTALLATION AND REPLACEMENT
54
Battery Cover
Battery
Battery
BATTERY INSTALLATION:
1. Take out 2 AAA batteries from computer box.
2. Press the buckle of battery cover on the back of the Computer (No. 54), then remove battery
cover.
3. Install 2 AAA batteries into the battery case on the back of the Computer (No. 54). Pay
attention to the battery + and –ends before installing.
4. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 54).
The installation is complete!
BATTERY REPLACEMENT:
1. Press the buckle of battery cover on the back of the Computer (No. 54), then remove battery
cover.
2. Remove the 2 old AAA batteries in the battery case and install 2 new AAA batteries into the
battery case on the back of the Computer (No. 54). Pay attention to the battery + and –ends
before installing.
3. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 54).
The replacement is complete!
NOTE: Always change both batteries at the same time. Do not mix battery types and do not mix old
and new batteries. Dispose of batteries according to your state and regional guidelines.

10
ADJUSTMENTS AND USAGE GUIDE
BA
#103
70
40
S13
ADJUSTING THE HEIGHT AND BALANCE
In order to achieve a smooth and comfortable ride, you must
ensure that the stability of the bike is secured. If you notice that
the bike is unbalanced during use, adjust the Adjustment Foot
Pad (No. 40) located beneath the Front & Rear Stabilizers (No.
2 & No. 3) of the bike. To do so, use Spanner (No. 103) to loosen
Hex Nut (No. 70) by turning it clockwise (direction A). With the nut
loosened, rotate the Adjustment Foot Pad (No. 40) until it sits
level with the surface that the bike is on. When you have finished
adjusting the Adjustment Foot Pad (No. 40), re-tighten the Hex
Nut (No. 70) by turning it counter-clockwise (direction B) to
complete the balance adjustment of the bike. If needed, repeat
this process to adjust the remaining adjustment foot pad.
22
ADJUSTING THE RESISTANCE
Adjust the resistance of the bike using the Tension Control Knob
(No. 22). Increase the level of resistance by turning the Tension
Control Knob (No. 22) to the RIGHT (clockwise), decrease the
level of resistance by turning the Tension Control Knob (No. 22)
to the LEFT (counter-clockwise).
EMERGENCY BRAKE
During use, users can stop the bike completely by pushing down
on the Tension Control Knob (No. 22). Pushing down on the
Tension Control Knob (No. 22) will enforce the brake and bring
the bike to an immediate stop.
23
23
7
8
ADJUSTING THE SEAT
The seat of this bike is fully adjustable as it moves Up, Down,
Fore (forward), Aft (backward).
To adjust the height of Seat Post (No. 7), loosen and pull the
Adjustment Knob (No. 23) outward, then raise or lower the Seat
Post (No. 7) to the desired height. Once adjusted, re-insert and
tighten the Adjustment Knob (No. 23) to secure the seat post in
place.
To adjust the seat back and forth, loosen and pull the Adjustment
Knob (No. 23) outward, then slide the Seat Slider (No. 8) to
desired position. Once positioned, re-insert and tighten the
Adjustment Knob (No. 23) to secure the seat slider in place.

11
23
5
ADJUSTING THE HANDLEBAR
It is important that the handlebar and seat are both set
to the correct height to your body. To adjust the
handlebar height, loosen and pull the Adjustment
Knob (No. 23) outward, then slide the Handlebar (No.
5) up or down to the desired height. Once adjusted,
re-insert and tighten the Adjustment Knob (No. 23) to
secure the handlebar in place.
ADJUSTING PEDAL STRAP
Your feet should be secured in the toe clips during
exercise. Place your feet as far forward into the toe
clips as you can. With your feet in place, turn the crank
to bring one foot to within arm’s reach, grasp the pedal
strap and pull it upward to tighten the toe clip cage.
Then insert the strap back into the hoop of the toe clip.
Repeat this process to secure your other foot.
5
23
2
TRANSPORTING THE BIKE
To move the bike, first ensure that the Handlebar (No.
5) is properly secured. If the handlebar is loose, tighten
the Adjustment Knob (No. 23) to secure it. Next,
stand at the front of the bike so that you’re directly in
front of the handlebar. Firmly grasp and hold each side
of the Handlebar (No. 5), place one foot on the Front
Stabilizer (No. 2) and tilt the bike towards you until the
transportation wheels on the Front Stabilizer (No. 2)
touch the ground. With the wheels on the ground, you
can transport the bike to the desired location with ease.
NOTE: Always use caution when moving the bike.
Unexpected impact, such as dropping the bike, may
cause injury and affect the bike’s operation.
DISMOUNTING
For your safety, it is recommended that you never attempt to dismount or remove your feet from the
pedals until both the flywheel and pedals/cranks have come to a complete stop. Failure to follow this
recommendation may lead to loss of control and/or serious injury.
Here are a few examples of how to safely dismount the bike:
1. Reduce the pedal speed until the pedals/cranks come to a complete stop.
2. Increase the resistance until the pedals/cranks come to a complete stop.
3. Push and hold the tension control knob down until the pedals/cranks come to a complete stop.

12
EXERCISE COMPUTER
FUNCTION BUTTON:
MODE:
1. Press the button for selection function display value on LCD.
2. Press the button and hold for 2 seconds to reset all values except
odometer to zero.
Note: When the user replaces batteries, all the values will reset to ZERO
automatically.
OPERATIONS:
AUTO ON/OFF: The computer will show the workout value automatically as the user begins to
exercise. When the bike has become inactive or without any exercise over 4 minutes, the computer
will turn off and the workout value on the odometer will be held. While the user starts the exercise
again, the workout value on odometer will accumulate continuously.
AUTO SCAN: After the computer is powered on or the Mode button is pressed, the LCD will display
all function values: TMR-SPD-DIST-CAL-ODO-RPM-PUL (repeat). Every function will display for 6
seconds.
FUNCTIONS:
SPD (SPEED): Displays the current speed being obtained. The range is from 0.0 to 99.9 MPH (Mile
per Hour).
DST (DISTANCE): Counts the total distance of an exercise from start to finish. The range is from
0.00 up to 9999 M (Mile).
TMR (TIME): Counts the total time of an exercise from start to finish. The range is from 00:00 up to
99:59.
CAL (CALORIES): Counts the total amount of calories burned during an exercise from start to
finish. The range is from 0.0 to 9999 KCAL. (The data is a rough guide which cannot be used in
medical treatment.)
ODO (ODOMETER): Displays the total amount of distance from the first use. The range is from 0.0
to 9999 M (Mile). User also can press the mode key to display the odometer value.
RPM: Counts each stroke within a minute. The range is from 0 to 400.
PUL (PULSE): Displays the user's heart rate in beats per minute during training. (The data is a rough
guide which cannot be used in medical treatment.)
NOTE: please put your hands on the hand pulses when in PULSE function.
Note:
1. If the computer display is abnormal, please re-install the batteries and try again.
2. Battery Spec: 1.5V UM-4 or AAA (2PCS).
3. The batteries must be removed from the appliance before it is disposed of safely.

13
MAINTENANCE INSTRUCTIONS
This is general information for daily, weekly and monthly maintenance to be performed on your bike.
DAILY MAINTENANCE
After each exercise session, wipe down all the
equipment: seat, frame, and handlebars. Pay
special attention to the seat post, handlebar post
and belt/chain guard. Sweat is very corrosive and
may cause problems that require parts
replacement later.
1. Get on the bike and engage the drive train.
2. Pay attention to any vibrations felt through the
pedals. If you feel any vibrations, you may
need to tighten the pedals, bottom bracket, or
adjust the drive belt/chain tension.
3. Use a wrench to tighten the pedals until they
are secure.
MONTHLY MAINTENANCE
1. Check if all hardware is secure, such as:
water bottle holder, flywheel nuts, belt/chain
guard bolts, brake caliper lock nuts, and
brake caliper tension rod nuts.
2. Inspect the brake tension rod for signs of
wear such as missing threads. Clean and
lubricate the brake tension rod.
3. Clean and lubricate the seat post, handlebar
post and seat slider. Remove any buildup of
foreign material.
WEEKLY MAINTENANCE
1. Inspect moving parts and tighten the
hardware.
2. Inspect pull pin frame fittings to make sure the
fittings are snug. Loose frame fittings may
strip out threads over time and cause
extensive damage.
3. Clean and lubricate pop pin assemblies. Pull
on the pin and spray a small amount of
lubricant onto the shaft.
4. Tighten the seat hardware to make sure the
seat is level and centered.
5. Brush and treat the resistance pads. Remove
any foreign material that may have collected
on the pads. Spray the pads with silicone
lubricant. This helps to reduce noise from
friction between the pads and the flywheel.
6. Visually inspect the bottom bracket, toe clips
and toe straps. If any of them are loose or
disconnected, attach and tighten.
LEATHER BRAKE PAD CARE (If applicable)
1. Perform this maintenance when the brake
pad is first installed and for the life of the
brake pad. Following these simple guidelines
can increase the life of your brake pads.
2. Some brake pad assemblies are
pre-lubricated. Squeeze the brake pad. If
lubricant is released, then the pad has been
pre-lubricated.
3. If the brake pad is dry, then coat the brake
pad with 3-n-1 oil. Brush the leather with a
clean, wire bristle brush, and then apply the
oil. The oil should be allowed to soak into the
pad. Repeat 4-5 times until the pad is
saturated, but not dripping with oil. When the
pad is saturated, it will no longer absorb oil.
4. Inspect the brake pad weekly and lubricate if
needed. The pad should not have a glazed
appearance. If the pad appears glazed, then
brush it with wire brush and apply lubricant as
needed. If any of the sponge padding is
showing through the leather pad, the brake
pad should be replaced.
Version 1.1

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